Scroll to see break-even price per barrel for oil in 2015 for select oil producers, and click on a country's name for more details. modest oil-price recovery and currency devaluations have lowered breakeven prices for countries like Russia and Nigeria, but some petrostates still need oil prices above $100 a barrel to balance their budgets.
There are dozens of types of gemstones â including diamonds, colored gemstones, and pearls â each with a unique set of physical and optical properties. GIRDLE â The narrow band around the perimeter of a polished or faceted diamond or colored gemstone.
See contemporary silver and gold designer jewelry with gemstones. Jewelry with brown gem stones comes in a variety of different shades, including copper, amber, auburn, beige, brick, bronze, chestnut, chocolate, cocoa, coffee, mahogany, rust and tan.hown below are pictures of some common and uncommon brown stones including tiger's eye, carnelian, citrine, topaz, sapphire, agate and jasper. The links below provide more information about a specific gemstone, pictures of jewelry made with the stone, or its corresponding birthstone facts.